Analog Electronics
Class B amplifier is biased

 at midpoint of load line.
 nearly twice cut-off.
 just at cut-off.
None of these

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Analog Electronics
Pinch-off voltage in a JFET is

 the gate to source voltage that gives unity drain current.
 the drain voltage that gives zero drain current.
 the gate to source voltage that gives zero drain current.
 the drain voltage that gives infinite drain current.

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